Species · Washington · BBS 2025 Release · 1966–2024
Harlequin Duck Population Trend in Washington
Harlequin Duck in Washington has fallen sharply: down 73% on the route-weighted index since 2000.
-73%Since 2000
5Routes In State
13Years
Notable Harlequin Duck Trends in Washington
long arc declinecomputed index
Harlequin Duck has fallen sharply in Washington: down 73% on the route-weighted index since 2000.
Harlequin Duck Survey Routes in Washington
| Twisp | 3 | 2000 | 1983 |
| Warm Beach | 2 | 2006 | 2006 |
| Hurricane Rg | 2 | 2023 | 2000 |
| Mazama | 1 | 2018 | 2018 |
| Winthrop | 1 | 2001 | 2001 |
Harlequin Duck Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.